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Updated: Oct 25, 2025

Synthesis of Information-bearing Peptoids and their Sequence-directed Dynamic Covalent Self-assembly
Published on: February 6, 2020
Rational Fabrication of Multiple Dimensional Assemblies from Tryptophan-Based Racemate
Yaqian Zhang1, Minggao Qin1, Chao Xing1
1State Key Lab of Metal Matrix Composites School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Researchers engineered complex self-assembling structures from tryptophan-based racemates (RPWM). Solvent and temperature control enabled tunable morphologies, demonstrating potential for dye removal and reusable supramolecular materials.
Area of Science:
- Supramolecular Chemistry
- Materials Science
- Organic Synthesis
Background:
- Amino acid derivatives offer accessible building blocks for complex assemblies.
- Morphological control of racemates in self-assembly remains largely unexplored.
- Tryptophan-based racemate (RPWM) is investigated for its assembly potential.
Purpose of the Study:
- To achieve tunable, multi-dimensional architectures from tryptophan-based racemates (RPWM).
- To investigate the influence of kinetic and thermodynamic parameters on RPWM assembly.
- To explore the application of RPWM assemblies in dye removal.
Main Methods:
- Rational modulation of kinetic and thermodynamic parameters during assembly.
- Utilizing different solvents to direct the formation of various nanostructures.
- Investigating temperature-dependent phase transitions of RPWM assemblies.
- Evaluating the efficiency and reusability of RPWM for organic dye (RhB) removal.
Main Results:
- Achieved 1D bundled nanofibers, 2D lamellar nanostructures, and 3D urchin-like microflowers by varying solvents.
- Demonstrated morphology evolution with changes in enantiomeric excess (ee) value.
- Observed formation of 0D nanospheres in water at 4°C, converting to lamellae at ambient temperature.
- RPWM assemblies showed efficient and reusable removal of RhB dye.
Conclusions:
- Engineering racemates assembly pathways allows for robust supramolecular materials.
- Tunable morphologies from RPWM open avenues for diverse applications.
- Temperature-responsive phase change behavior enhances material functionality for pollutant removal.
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